[FL-2627] Flipper applications: SDK, build and debug system (#1387)

* Added support for running applications from SD card (FAPs - Flipper Application Packages)
* Added plugin_dist target for fbt to build FAPs
* All apps of type FlipperAppType.EXTERNAL and FlipperAppType.PLUGIN are built as FAPs by default
* Updated VSCode configuration for new fbt features - re-deploy stock configuration to use them
* Added debugging support for FAPs with fbt debug & VSCode
* Added public firmware API with automated versioning

Co-authored-by: hedger <hedger@users.noreply.github.com>
Co-authored-by: SG <who.just.the.doctor@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>

applications/services/power/power_service/views/power_off.h

@@ -0,0 +1,22 @@
+#pragma once
+
+typedef struct PowerOff PowerOff;
+
+typedef enum {
+    PowerOffResponseDefault,
+    PowerOffResponseOk,
+    PowerOffResponseCancel,
+    PowerOffResponseHide,
+} PowerOffResponse;
+
+#include <gui/view.h>
+
+PowerOff* power_off_alloc();
+
+void power_off_free(PowerOff* power_off);
+
+View* power_off_get_view(PowerOff* power_off);
+
+void power_off_set_time_left(PowerOff* power_off, uint8_t time_left);
+
+PowerOffResponse power_off_get_response(PowerOff* power_off);